Do mecanum wheels move foward and sideways at the same rate?

[onion3000]

Say you have a robot with mecanum wheels and move all the motors forward one rotation, and the robot moves forwards x cm. If you make the robot go sideways where each of the motors moves one rotation, does the robot move sideways x cm as well? Does it depend on the angle of the rollers on the wheels?

 

[Bystander]

Does it depend on the angle of the rollers on the wheels?

What are your thoughts?

 

[Sponson]

Speaking from experience, Mecanum side-to-side motion is about 1/2 the forward back motion, on a hard, short carpeted surface.